Foursquare Birthday Party in Chicago on Mar 23, at 6:00PM: http://ping.fm/JgqHW

Foursquare Birthday Party

FoursquareTM is turning two years old and you are invited to the birthday party. The mobile application was first introduced at the South by Southwest (SXSW) conference in Austin, TX in March 2009. FoursquareTM quickly became the breakout mobile application at the conference. Currently, Foursquare has over 4 million users and partnerships with Bon Appetit, Bravo, Louis Vuitton, MTV, People Magazine, Walgreens, Zagat, etc.
Ticket information is at: http://ping.fm/4O3fu